EP0149867B1 - Durch Strahlung härtbarer Überzug und damit überzogene elektronische Bauelemente - Google Patents

Durch Strahlung härtbarer Überzug und damit überzogene elektronische Bauelemente Download PDF

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Publication number
EP0149867B1
EP0149867B1 EP84201890A EP84201890A EP0149867B1 EP 0149867 B1 EP0149867 B1 EP 0149867B1 EP 84201890 A EP84201890 A EP 84201890A EP 84201890 A EP84201890 A EP 84201890A EP 0149867 B1 EP0149867 B1 EP 0149867B1
Authority
EP
European Patent Office
Prior art keywords
ultraviolet radiation
coating
composition
coating composition
radiation cured
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84201890A
Other languages
English (en)
French (fr)
Other versions
EP0149867A3 (en
EP0149867A2 (de
Inventor
Jacob Calvin Bill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips North America LLC
Original Assignee
North American Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by North American Philips Corp filed Critical North American Philips Corp
Publication of EP0149867A2 publication Critical patent/EP0149867A2/de
Publication of EP0149867A3 publication Critical patent/EP0149867A3/en
Application granted granted Critical
Publication of EP0149867B1 publication Critical patent/EP0149867B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/12—Protection against corrosion
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
    • C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
    • C08F299/022—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polycondensates with side or terminal unsaturations
    • C08F299/024—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polycondensates with side or terminal unsaturations the unsaturation being in acrylic or methacrylic groups
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/005—Constructional details common to different types of electric apparatus arrangements of circuit components without supporting structure

Definitions

  • This invention relates to an ultraviolet radiation curable liquid composition particularly adapted for the formation of protective coating on heat degradable electronic components.
  • this invention relates to an ultraviolet hardenable resin composition particularly adapted for providing a protective coating on heat sensitive axial leaded or radial leaded film/foil or metallized capacitors and to the resultant coated capacitors.
  • Another object of this invention is to provide a low temperature hardenable composition for electric components that may be rapidly and readily be applied to said components.
  • the applicant has prepared a new and novel ultraviolet radiation curable liquid coating composition particularly adapted for forming a shock resistant, moisture impermeable, abrasive resistant printed circuit solvent resistant coating on axial or radial leaded metallized or film/foil capacitors comprising polypropylene or polystyrene film.
  • the ultraviolet radiation curable liquid coating composition of the invention comprises a liquid mixture of an acrylated epoxy oligomer, a multifunctional urethane oligomer, a hydroxyalkyl methacrylate monomer, an aliphatic bicyclic monofunctional acrylate monomer, a calcined cobalt alumina pigment and at least one thermal and one U.V. free radical initiator. It was found, quite unexpectedly, that the addition of the calcined cobalt alumina pigment not only provided a blue color to the hardened coating but aided in the acceleration of the hardening reaction.
  • novel liquid curable composition of the invention has been found to be particularly useful for providing hardened, abrasive resistant, moisture impermeable solvent resistant coatings on electronic components at temperatures below 80°C particularly on axial leaded polypropylene or polystyrene film/foil or metallized capacitors.
  • the coating compositions of the invention when applied in layers of from 250-300 ⁇ m were found, within 1 to 5 seconds, to have hardened to abrasive resistant, water impermeable, solvent resistant coatings when exposed to ultraviolet radiation with the temperature of the coating compositions being raised by the heat of reaction below the melt point of polystyrene film (i.e. 105°C).
  • an antifoaming agent may be added to the curable composition.
  • an antifoaming agent such as a polyalkylsiloxane polymer may be added.
  • Coatings of the invention may be applied to the component by methods well known in the art, for example, by dipping, spraying or rolling.
  • Another advantage of the coating compositions of the invention is that not only are they curable by ultraviolet radiation but they are also heat curable at temperatures below 80°C. This feature is of importance particularly when, due to shadowing, total ultraviolet curing of a section of a coated device is not possible.
  • an ultraviolet radiation curable composition comprising an acrylated epoxy oligomer, an acrylated urethane oligomer, a hydroxyalkyl methacrylate monomer, an aliphatic bicyclic monofunctional monomer and a photoinitiator.
  • the sole figure in the drawing is a cross-sectional view of an axial leaded film/foil polystyrene film capacitor coated with the composition of the invention.
  • curable coating compositions of the invention are usable for use on electronic components containing ingredients degradable at temperatures below 105°C or less such as polypropylene and polystyrene they are particularly useful for coating electronic components containing polystyrene which is performance degradable at about 80°C.
  • the coating of the invention may be applied either as a single or as a multiple coating.
  • a liquid coating composition of the following composition was prepared:
  • a thin liquid coating of a thickness of about 300-400 pm of this liquid coating composition was applied by roller coating to the surface 1 of a film/foil polystyrene film capacitor 3 supplied with axial leads 5 and 7 was then exposed to a source of ultraviolet radiation of an intensity of 200 watts per inch and cured to hardness within a period of 2 to 4 seconds.
  • a second coating 11 of a similar thickness was applied employing the same process. This second coating was also exposed to a ultraviolet lamp at an intensity of 200 watts per inch and curing was achieved in about 2 to 4 seconds.
  • the capacitor was then postcured by being exposed by being heated at a temperature of 70-80°C for 2) hours.
  • the capacitor was supplied with a hard, abrasive resistant, water impermeable, solvent resistant coating.
  • Tests carried out on the film/foil polystyrene film capacitors coated by the method of the invention and uncoated metallized polystyrene film capacitors showed that the capacitors coated with the coating of the invention exhibited no degradation of properties while being adequately protected against cleaning solvents, abrasion and moisture.
  • this temperature sensitive part can now be auto inserted and wave soldered making it a viable component for high production mechanization.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
  • Formation Of Insulating Films (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Claims (7)

1. Durch Ultraviolettstrahlung härtbare flüssige Deckschichtzusammensetzung, insbesondere zum Bedecken eines auf eine niedrige Temperatur herabsetzbaren elektronischen Bauelementes mit einer Schutzschicht, wobei diese Zusammensetzung ein flüssiges Gemisch eines akrylierten Epoxyoligomers, eines akrylierten Urethanoligomers, eines Hydroxyalkylmethakrylatmonomers, eines aliphatischen bizyklischeh monofunktionellen Monomers und wenigstens eines UV frei-radikalen Initiators aufweist, dadurch gekennzeichnet, dass die Zusammensetzung ein kalziniertes Kobaltaluminiumoxidpigment und wenigstens einen thermischen frei-radikalen Initiator aufweist.
2. Flüssige Deckschichtzusammensetzung nach Anspruch 1, dadurch gekennzeichnet, dass ausserdem ein Antischaummittel vorhanden ist.
3. Elektronisches Bauelement mit einer durch Ultraviolettstrahlung ausgehärteten, aus der Deckschichtzusammensetzung nach Anspruch 1 gebildeten Deckschicht.
4. Elektronisches Bauelement mit einer durch Ultraviolettstrahlung ausgehärteten, aus der Deckschichtzusammensetzung nach Anspruch 2 gebildeten Deckschicht.
5. Schichtkondensator mit einer durch Ultraviolettstrahlung härtbaren Schicht aus der Deckschichtzusammensetzung nach Anspruch 2.
6. Mit axialen Anschlüssen versehener Polystyrolschichtkondensator mit einer durch Ultraviolettstrahlung ausgehärteten, aus der Deckschichtzusammensetzung nach Anspruch 1 gebildeten Deckschicht.
7. Mit axialen Anschlüssen versehener Polystyrolschichtkondensator mit einer durch Ultraviolettstrahlung ausgehärteten, aus der Deckschichtzusammensetzung nach Anspruch 2 gebildeten Deckschicht.
EP84201890A 1983-12-27 1984-12-18 Durch Strahlung härtbarer Überzug und damit überzogene elektronische Bauelemente Expired EP0149867B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/565,685 US4533975A (en) 1983-12-27 1983-12-27 Radiation hardenable coating and electronic components coated therewith
US565685 1983-12-27

Publications (3)

Publication Number Publication Date
EP0149867A2 EP0149867A2 (de) 1985-07-31
EP0149867A3 EP0149867A3 (en) 1985-08-28
EP0149867B1 true EP0149867B1 (de) 1989-06-14

Family

ID=24259680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201890A Expired EP0149867B1 (de) 1983-12-27 1984-12-18 Durch Strahlung härtbarer Überzug und damit überzogene elektronische Bauelemente

Country Status (4)

Country Link
US (1) US4533975A (de)
EP (1) EP0149867B1 (de)
JP (1) JPS60158633A (de)
DE (1) DE3478727D1 (de)

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EP0206086B1 (de) * 1985-06-10 1992-09-09 Canon Kabushiki Kaisha Strahlenhärtbare Harzzusammensetzung
JPS61285201A (ja) * 1985-06-13 1986-12-16 Canon Inc 活性エネルギ−線硬化型樹脂組成物
DE3620254C2 (de) * 1985-06-18 1994-05-05 Canon Kk Durch Strahlen mit wirksamer Energie härtbare Harzmischung
EP0209753B1 (de) * 1985-06-26 1993-09-01 Canon Kabushiki Kaisha Strahlenhärtbare Zusammensetzung
DE3621477A1 (de) * 1985-06-26 1987-01-08 Canon Kk Durch strahlen mit wirksamer energie haertbare harzmischung
JPH0686505B2 (ja) * 1986-03-10 1994-11-02 キヤノン株式会社 活性エネルギ−線硬化型樹脂組成物
JPH0698760B2 (ja) * 1986-10-13 1994-12-07 キヤノン株式会社 液体噴射記録ヘツド
JPH0698759B2 (ja) * 1986-10-13 1994-12-07 キヤノン株式会社 液体噴射記録ヘツド
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DE4007519A1 (de) * 1990-03-09 1991-09-12 Rheydt Kabelwerk Ag Durch uv-strahlen haertbare farbgebende harzmischung
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US6063828A (en) * 1998-07-02 2000-05-16 National Starch And Chemical Investment Holding Corporation Underfill encapsulant compositions for use in electronic devices
US6054248A (en) * 1999-03-12 2000-04-25 Arch Specialty Chemicals, Inc. Hydroxy-diisocyanate thermally cured undercoat for 193 nm lithography
US6824874B1 (en) * 2000-08-23 2004-11-30 Dana Corporation Insulator and seal for fuel cell assemblies
US20080254229A1 (en) * 2005-10-03 2008-10-16 Lake Randall T Radiation Curable Coating Composition and Method
KR101463640B1 (ko) 2007-07-30 2014-11-19 아사히 가라스 가부시키가이샤 경화성 수지 조성물, 이것을 사용한 투명 적층체 및 그 제조 방법
KR20130026062A (ko) * 2011-09-05 2013-03-13 삼성전자주식회사 인쇄회로기판 조립체 및 그 제조방법
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Also Published As

Publication number Publication date
DE3478727D1 (en) 1989-07-20
JPS60158633A (ja) 1985-08-20
EP0149867A3 (en) 1985-08-28
EP0149867A2 (de) 1985-07-31
US4533975A (en) 1985-08-06

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